[Feature Request] TreeTable Enhancement

[chao921125]

Existing Component

是

Component Name

Table

Description

1、自定义图标（Custom icons）
2、开放展开、收缩点击事件（Open and Expand and Shrink Click Events）
3、设置默认展开、收缩（Set default expansion and contraction）
4、复选框功能完善（Complete function of check box）

[element-bot]

Translation of this issue:

Existing Component

yes

Component Name

Table

Description

Custom icons

Open and Expand and Shrink Click Events
3. Set default expansion and contraction

4. Complete function of check box

[YuThree]

Open and Expand and Shrink Click Events
Set default expansion and contraction
Very necessary！！！

[YuThree]

another suggestion is that the height of the table should be adapted to the height of the table when it is expanded
like the function I found in code is

updatescrolly

[iamkun]

#15170